HEP Software Foundation India - IUCAA Joint Computing Workshop

Apr 20, 2026, 6:30 AM → Apr 24, 2026, 11:59 PM Asia/Kolkata

Lecture Hall/Bhaskara-3 (IUCAA, Pune, India)

Gravitational-Wave Computing Software and Pipelines Workshop 2026

The HSF–India and IUCAA Joint 5-Day Computing Workshop aims to train Indian early-career researchers in the computational pipelines and software frameworks used in modern gravitational-wave data analysis. The workshop is primarily designed for PhD students, postdoctoral researchers, and faculty members, with a limited number of master’s students interested in gravitational-wave astronomy, computational astrophysics, and large-scale scientific computing.

This workshop represents an important step in the human resource development efforts associated with LIGO-India. It builds on earlier national training initiatives, including the LIGO-India Computing Workshop held in September 2024 and the Instrumentation and Data Characterisation Workshops conducted at IUCAA in December 2025. By focusing on hands-on training in widely used analysis pipelines, the workshop seeks to strengthen India's research capacity in preparation for the upcoming LIGO-India detector and the broader international network of gravitational-wave observatories.

The workshop is designed to:

• Provide hands-on training in production-level gravitational-wave data analysis pipelines.
• Introduce participants to high-performance computing (HPC) and high-throughput computing (HTC) environments used in large-scale analyses.
• Develop computational skills required to contribute to LIGO–Virgo–KAGRA scientific analyses.
• Familiarise participants with modern Bayesian inference methods and search techniques.

Participants will work through guided tutorials, practical exercises, and example workflows that mirror real analysis pipelines used in current gravitational-wave research. The workshop will cover several key pipelines and analysis frameworks used in gravitational-wave astronomy, including:

• Compact Binary Coalescence Searches: Detection of signals from merging binary black holes and neutron stars using the PyCBC search pipeline.
• Parameter Estimation of Gravitational-Wave Transients and population inference: Methods to infer astrophysical properties of gravitational-wave sources from detected signals. Bayesian Inference of parameter and hyperparameter estimation of gravitational-wave sources using the Bilby framework, including population inference techniques.
• Burst Searches: Search and reconstruction techniques for unmodeled or weakly modelled transient gravitational-wave signals using Coherent Wave Burst (cWB)
• Stochastic Gravitational-Wave Background Searches: Methods to detect the stochastic gravitational-wave background produced by unresolved astrophysical or cosmological sources.

 

IMPORTANT: Information about accommodation and logistics at IUCAA for participants and resource persons is available here: Information Sheet

InformationSheet-v0-17-April-2026.pdf

Mon, April 20

8:00 AM → 9:00 AM Breakfast

9:00 AM → 9:15 AM Workshop Inaugural Session: Address to workshop participants and resource persons by the Director, IUCAA

Workshop Inaugural Session

Convener: Prof. Bhooshan Gadre (IUCAA)

9:15 AM → 10:00 AM CWB Lecture 1

Speaker: Prof. Marek Szczepanczyk (ITP, University of Warsaw, Poland)

2026.04.20_Pune.pdf

10:00 AM → 11:00 AM CWB Lecture + Hands-on Session 1

Hands-on Sessions Materials is available at ~tanmaya.mishra/O4/SEARCHES/OFFLINE/BBH/LH/BKG/O4_K07_C00_LH_BBH_BKG_tst2 on Sarathi

Speakers: Prof. Marek Szczepanczyk (ITP, University of Warsaw, Poland), Dr Tanmaya Mishra (ICG, University of Portsmouth, UK)

11:00 AM → 11:30 AM Tea/Coffee Break

11:30 AM → 1:00 PM CWB Hands-on Session 1 (Contd.)

Speakers: Prof. Marek Szczepanczyk (ITP, University of Warsaw, Poland), Dr Tanmaya Mishra (ICG, University of Portsmouth, UK)

1:00 PM → 2:00 PM Lunch Break

2:00 PM → 3:30 PM Enhancing cWB with XGBoost

Speaker: Dr Tanmaya Mishra (ICG, University of Portsmouth, UK)

IUCAA_Workshop-2.pdf

3:30 PM → 4:00 PM Tea/Coffee Break

4:00 PM → 5:30 PM CWB Hands-on Session 2

Hands-on Sessions Materials is available at ~tanmaya.mishra/O4/SEARCHES/OFFLINE/BBH/LH/SIM/O4_K07_LH_BBH_SIM_PLP_Aug2024_IUCAA_tst2 on Sarathi

Speakers: Prof. Marek Szczepanczyk (ITP University of Warsaw Poland), Dr Tanmaya Mishra (ICG, University of Portsmouth, UK)

5:30 PM → 6:00 PM Snack Break

8:00 PM → 9:00 PM Dinner

Tue, April 21

8:00 AM → 9:00 AM Breakfast

9:00 AM → 11:00 AM PyCBC Lecture 1

Speakers: Dr Rahul Dhurkunde (ICG, University of Portsmouth, UK), Dr Max Trevor (University of Maryland USA)

PyCBC Lectures.pdf

11:00 AM → 11:30 AM Tea/Coffee Break

11:30 AM → 1:00 PM PyCBC Lecture 2

Speakers: Dr Max Trevor (University of Maryland USA), Dr Rahul Dhurkunde (ICG, University of Portsmouth, UK)

PyCBC Lectures.pdf

1:00 PM → 2:00 PM Lunch Break

2:00 PM → 3:30 PM PyCBC Hands-on Session 1

Hands-on Sessions materials is available at ~rahul.dhurkunde/offline_search_example/ on Sarathi

Speakers: Dr Rahul Dhurkunde (ICG, University of Portsmouth, UK), Dr Max Trevor (University of Maryland USA), Johann Fernandes (IIT Bombay)

3:30 PM → 4:00 PM Tea/Coffee Break

4:00 PM → 5:30 PM PyCBC Hands-on Session 2

Hands-on Sessions Materials is available at ~johann.fernandes/HSF_workshop_nb/ on Sarathi

Speakers: Dr Max Trevor (University of Maryland USA), Dr Rahul Dhurkunde (ICG, University of Portsmouth, UK), Johann Fernandes (IIT Bombay)

5:30 PM → 6:00 PM Snack Break

7:30 PM → 9:00 PM Dinner: Special Dinner

Wed, April 22

8:00 AM → 9:00 AM Breakfast

9:00 AM → 11:00 AM Bilby Lecture 1

Speaker: Dr Colm Talbot (Princeton University USA)

Git repository with all materials

HSFIndia2026-individual.key

Lecture 1.md

11:00 AM → 11:30 AM Tea/Coffee Break

11:30 AM → 1:00 PM Bilby Hands-on Session 1

Hands-on Sessions Materials Available here:

Speaker: Dr Colm Talbot (Princeton University USA)

1809.02293v9.pdf

1:00 PM → 2:00 PM Lunch Break

2:00 PM → 3:30 PM Bilby Lecture 2

Speaker: Dr Colm Talbot (Princeton University USA)

Git repository with all materials

HSFIndia2026-population.pdf

Lecture 2.md

3:30 PM → 4:00 PM Tea/Coffee Break

4:00 PM → 5:30 PM Bilby Hands-on Session 2

Hands-on session material available here:

Speaker: Dr Colm Talbot (Princeton University USA)

5:30 PM → 6:00 PM Snack Break

8:00 PM → 9:00 PM Dinner

Thu, April 23

8:00 AM → 9:00 AM Breakfast

9:00 AM → 11:00 AM Stochastic Background Lecture 1

Speaker: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan)

lecture 1 on SGWB.key

lecture 1 on SGWB.pdf

11:00 AM → 11:30 AM Tea/Coffee Break

11:30 AM → 1:00 PM Stochastic Background Lecture 2

Speaker: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan)

Lecture 2 pygwb.key

Lecture 2 pygwb.pdf

1:00 PM → 2:00 PM Lunch Break

2:00 PM → 3:30 PM Stochastic Background Hands-on Session 1

Overview of the O4 parameter estimation results, same materials in the lecture 1.

Speakers: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan), Yogita Kumari (IUCAA, Pune)

3:30 PM → 4:00 PM Tea/Coffee Break

4:00 PM → 5:30 PM Stochastic Background Hands-on Session 2

Reivew of anisotropic O4 results, introduction and hand-on section for pygwb pipeline. same material in lecture 2.

Speakers: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan), Yogita Kumari (IUCAA, Pune)

HSF_presentation.pdf

Pystoch

5:30 PM → 6:00 PM Snack Break

7:30 PM → 10:30 PM Banquet Dinner Venue: The White House Hotel, Aundh, Pune (Map URL: https://maps.app.goo.gl/qsJRnfsCUMXA7fN78?g_st=aw ): Banquet Dinner

Banquet Dinner at The White House Hotel, Aundh, Pune (Map URL: https://tinyurl.com/whhotel23042026 )

Fri, April 24

8:00 AM → 9:00 AM Breakfast

9:00 AM → 11:00 AM Hackathon Session 1

Speakers: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan), Dr Colm Talbot (Physics Department, Princeton University, USA), Johann Fernandes (IIT Bombay), Yogita Kumari (IUCAA, Pune)

cWB_Hackathon_Exercise_1.pdf

11:00 AM → 11:30 AM Tea/Coffee Break

11:30 AM → 1:00 PM Hackathon Session 2

Speakers: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan), Dr Colm Talbot (Physics Department, Princeton University, USA), Johann Fernandes (IIT Bombay), Prof. Marek Szczepanczyk (ITP, University of Warsaw, Poland), Dr Rahul Dhurkunde (ICG, University of Portsmouth, UK), Dr Tanmaya Mishra (ICG, University of Portsmouth, UK), Yogita Kumari (IUCAA, Pune)

cWB_Hackathon_Exercise_2.pdf

1:00 PM → 2:00 PM Lunch Break

2:00 PM → 3:30 PM Hackathon Session 3

Simulate for real-life situation of analyzing O4a data.

Speakers: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan), Dr Colm Talbot (Physics Department, Princeton University, USA), Johann Fernandes (IIT Bombay), Prof. Marek Szczepanczyk (ITP, University of Warsaw, Poland), Dr Rahul Dhurkunde (ICG, University of Portsmouth, UK), Dr Tanmaya Mishra (ICG, University of Portsmouth, UK), Yogita Kumari (IUCAA, Pune)

HSF INDIA - IUCAA JOINT computing workshop stochastic hackathon.pdf

3:30 PM → 4:00 PM Tea/Coffee Break

4:00 PM → 5:30 PM Hackathon Session 4

Speakers: Dr Chia-Hsuan Hsiung (Tamkang University, Taiwan), Dr Colm Talbot (Physics Department, Princeton University, USA), Johann Fernandes (IIT Bombay), Prof. Marek Szczepanczyk (ITP, University of Warsaw, Poland), Dr Rahul Dhurkunde (ICG, University of Portsmouth, UK), Dr Tanmaya Mishra (ICG, University of Portsmouth, UK), Yogita Kumari (IUCAA, Pune)

2026.04.20_Pune.pdf

5:30 PM → 6:00 PM Snack Break

8:00 PM → 9:00 PM Dinner